Course detail

Protection of Electrical Power Equipment

FEKT-KOJZAcad. year: 2018/2019

Electrical power systems protection at failure state. Line, busbar, transformer, generator and motor protection. Digital protection integrated systems.

Learning outcomes of the course unit

The students pass out the course are able to: - give details of fundamental types of protection relays and its basic characteristics - explain the principles of main types protection relays - calculate short circuit situations in the power network - design of setting overcurrent protection of small systems - describe automatic reclosing


The knowledge of the course of Distribution of Electric Energy is required. Student has ability to calculate the three-phase initial short-circuit current in the radial power system.


Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

TLUSTÝ, Josef, Jan KYNCL, Ladislav MUSIL, Jan ŠPETLÍK, Jan ŠVEC, Petr HAMOUZ, Zdeněk MÜLLER a Miroslav MÜLLER. Monitororvání, řízení a chránění elektrizačních soustav. Vyd. 1. Praha: České vysoké učení technické, 2011, 255 s. ISBN 978-80-01-04940-2.
TOMAN, Petr et al. Provoz distribučních soustav. Vyd. 1. Praha: České vysoké učení technické v Praze, 2011, 263 s. ISBN 978-80-01-04935-8.
SLEVA, Anthony F. Protective relay principles. Boca Raton: CRC Press, c2009, xvii, 349 s. ISBN 978-0-8247-5372-6.
HALUZÍK, Evžen. Ochrany a automatiky v elektrických sítích. 1. vyd. Brno: VUT, 1986, 160 s.

Planned learning activities and teaching methods

Teaching methods include tutorial lectures and practical laboratories. Course is taking advantage of e-learning (Moodle) system. Students have to write specified number of projects during the course.

Assesment methods and criteria linked to learning outcomes

The course is evaluated by student’s activity in the lessons, individual work and it is finished by exam valuation. The exam has practical and theoretical parts. Students can obtain: up to 40 points from the tutorial lessons (individual work and protocols from laboratory exercise) up to 60 points from the exam (30 points practical part and 30 points theoretical part) Detailed requirements for completion of the course are specified by a regulation issued by the lecturer responsible for the course and updated every year.

Language of instruction


Work placements

Not applicable.

Course curriculum

1. Electrical power systems failure state. Sorting of protection (relay, static, digital). 2. Symmetrical and unsymmetrical short circuit fault calculation. 3. Voltage and current transformer. 4. Line protections. Fuses and circuit breakers. 5. Overcurrent relays. Current and time setting. 6. Distance protections. Characteristics and setting. 7. Distance protections supplemental equipment. Wrong measuring cause. 8. Comparative protections. Comparative protection ties. 9. Auto - reclosing automatics. Protection cooperation near auto reclosing. 10. Busbar protections. Transformer protections. 11. Generator protections. 12. Motor protections. Earth fault protections 13. Integrated intelligent systems protection.


Knowledge of the method of electrical power systems protection at failure state.

Specification of controlled education, way of implementation and compensation for absences

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Classification of course in study plans

  • Programme EEKR-BK Bachelor's

    branch BK-SEE , 3. year of study, summer semester, 6 credits, optional specialized

  • Programme EEKR-CZV lifelong learning

    branch ET-CZV , 1. year of study, summer semester, 6 credits, optional specialized

Type of course unit



39 hours, optionally

Teacher / Lecturer

Fundamentals seminar

6 hours, optionally

Teacher / Lecturer

Exercise in computer lab

4 hours, compulsory

Teacher / Lecturer

Laboratory exercise

16 hours, compulsory

Teacher / Lecturer